Grinding-wheel.



E. R. HYDE.

GRINDING WHEEL.

APPLIOATION FILED JUNE 23. 1914.

1 ,133,475. Patented Mar. 30, 1915.

2 SHEETS-SHEET l.

WITNESSES: l/VI/E/VTOH away/6149 0 5 //7. 8mm BY ATTORNEY E. R. HYDE.

GRINDING WHEEL.

APPLICATION FILED JUNE 23.1914.

1,1 33,475. Patented Mar. 30, 1915.

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GRINDING-WHEEL.

Specification of Letters Patent.

Application filed June 23, 1914. Serial N 0. 846,752.

'To all whom it may concern:

Be it known that T, ELWIN R. HYDE, a citizen of the United States, residing at Bridgeport, county of Fairfield, State of Connecticut, have invented an Improvement in Grinding-Wheels, of which the following is a specification.

This invention has for its object to produce a simple and inexpensive grinding wheel especially adapted for face. grinding, which shall comprise a flanged carrying disk, a plurality of grinding blocks of novel configuration and means for adjusting the blocks so that the blocks maybe practically used up, thereby avoiding waste and greatly reducing the cost of the operation of grinding. With these and other objects in view I have devised the novel grinding wheel and grinding blocks therefor, which I will now describe, referring to the accompanying drawings forming a part of this specification and using reference characters to indicate the several parts.

v Figure 1 is a face view of my novel grinding wheel, a portion of the blocks being re moved; Fig. 2 a section on the line 22 in -Fig. 1, looking in the direction of the arrows; Fig. 3 a section on the line 3-3 in Fig. 1, looking in the direction of the arrows; Fig. 4 a view of the base plate of one of the grinding blocks detached, and Fig. 5 is a section of a grinding block complete on the line indicated by 5-5 in Fig. 4:, looking in the direction of the arrows. 7

10 denotes the carrying disk which is provided with a central hub 11, an inner flange 12 and an outer flange 13.

Mai

14 denotes the grinding blocks which are adjustably secured between the flanges of the carrying disk, their operative faces projecting beyond the flanges. The outer end of each grinding block is a convex curve corresponding with the inner face'of the outer flange and the inner end of each grinding block is a concave curve corresponding with the outer face of the inner flange and the sides are straight lines oblique to radial lines.

The wheel in use rotates clockwise and the front edge of each grinding block, indicated by 19, is tangential to an imaginarycircle within and concentric with the curve of-the inner end of the block, the rear edge of each ing blocks is not of the essence of the in vention. It is however essential that their side lines be oblique to radial lines. This is in order to produce a shearing action of the edges of the grinding blocks upon the work that is being operated upon. If thepiece of work is narrow it prevents the possibility of the work being crowded into the space between two blocks. For convenience T will describe the grinding blocks as in pairs. Between each pair of grinding blocks and the two contiguous grinding blocks I place a wall 15 parallel with the sides of the blocks. These walls may if preferred be cast integral with the disk and flanges, but are shown as made separate and attached thereto by holding screws 16 passing through the respective flanges and engaging the ends of the walls, which are shown as widened to provide more metal for engagement by the screws, the corresponding corners of the holding blocks being chamfered off as at 17. An additional holding screw for each wall may be provided passing through the disk and engaging the wall cen- %rally as indicated by dotted lines at 18 in Between each pair of grinding blocks, that is between the two grinding blocks lying between any twowalls, I place an angu- Patented Mar. so, 1915.

lar locking block 20, each block having a side of the front grinding block of the pair.. That is to say, each alternate grindlng block is provided with a chamfer 23. Each grinding block is provided with a base plate 24; having on its inner face an overhanging flange 25 and a threaded hub 26 which is engaged by a screw 27. The material of the block is molded under the flange thereby rigidly securing the base plate thereto. The unthreaded outer end of each screw passes through the carrying disk between the flanges and is provided with collars 28 lyingon opposite sides of the disk which retain the screw against longitudinal movement, so that rotation of the screw will move the grinding block inward or outward as may be required. After adjustment, the grinding blocks are locked in position by the lock- 7 ing blocks. The outer face of the inner flange is inclined slightly from the carrying disk downward and'outward, as shown in Fig. 3, and the corresponding face 29 of each locking block is inclined slightly from required, to lock or release the corresponding pair of grinding blocks.

As an additional means ofsetting each locking block tightly against the front side and the chamfer respectively of the corresponding pair of grinding blocks, I pro-' vide set screws 32 in the inner flange, the inner ends of which bear against thefaces 29- of the locking blocks and crowd them into engagement with the corresponding grinding blocks.- A lock nut 33 is preferably provided on each set screw to lock it against backward movement after the set screw has been turned forward against the locking block. It will be noted that the locking of the grinding blocks is effected by forcing each grinding block 'againsttheouter flange and one of the walls, each locking block acting on two grinding blocks.-

An important feature of the invention is that clearance spaces 34 are left between contiguous grinding blocksiwhich receive the particles removed from the grinding blocks and the surface being operated upon and prevent clogging at the'front edges of the grinding blocks.

To adjust the grinding blocks at any time the set screws are first loosened, then the locking blocks are loosened by rotation of screws 30 and then the grinding blocks are set forward as much as may be required by rotation of screws 27 after which the locking blocks are moved to the locking position by screws 30 and are set tightly against the corresponding grinding blocks and locked there by means of the set screws and lock nuts. Each grinding block is thus forced against the outer flange and one of the walls. Having thus described my invention I claim:

1. A grinding wheel comprising a carrying disk having i er and outer flanges on 5 its face, walls between said flan oblique to radial lines, grinding blocks in pairs lying between the walls, and means. for forcing the blocks of each pair against contiguous walls and the outer flange to'lock them in place. c I

' 2. A grinding wheel comprising a'carrying disk having inner. and outer flanges on its face, walls between said flanges oblique to radial lines, grinding blocks in pairs lying between the walls, a locking block between the grinding blocks of each pair and means for moving the locking blocks into locking position.

3. A grinding wheel comprising a carrying-disk having inner and outer flanges on its face, walls between said flanges oblique toradial lines, grinding blocks in pairs lying between the walls, means for adjusting the grinding blocks inward and outward and means for locking the grinding blocks in position after adjustment.

l. A grinding wheel comprising a carrying disk having inner and outer flanges 011 its face, walls between said flanges oblique tov radial lines, grinding blocks in pairs lying between the walls, means for adjusting the grinding blocks inward and outward, a locking block between each pair of grinding blocks and means for moving the locking blocks into locking position.

5. A grinding wheel comprising a carrying disk having flanges on its face, grinding blocks provided with base plates, screws engaging the base plates to move said blocks inward or outward and means for locking said blocks after adjustment.

6. A grinding wheel comprising a carrying disk having flan es on its face, grinding blocks provided with base plates, screws engaging the base plates to move said blocks inward or outward, angular locking blocks each acting on two grinding blocks and screws engaging the locking blocks to move and retain them in locking position.

7. A grinding wheel comprising a carryit ing disk having inner and outer flanges on its face, said inner flange being inclined on its outer face and oblique walls between the flanges, grinding blocks, inclined .locking blocks each acting on two grinding blocks, and screws held in the carrying disk and engaging the grinding blocks and the looking blocks, substantially as described, for the purpose specified.

8. A grinding wheel comprising a carry- 11.; ing disk having inner and outer flanges on its face and oblique walls between the flanges, grinding blocks in pairs between .the walls and adapted to project beyond the walls, leaving clearance spaces between the 126 grinding blocks, and a locking block between the grinding blocks of each pair acting to force the grinding blocks against the walls and the outer flange.

9. A grinding wheel comprising a carry-'12s ing disk having inner and outer flanges on its face and oblique walls between the flanges, grinding blocks in pairs between the walls and adapted to project beyond the walls, leaving clearance spaces between the meagre grinding blocks, screws for moving the base provided with a threaded hole and grinding blocks inward and outward, lockwhose inner and outer ends are respectively ing blocks between the grinding blocks of concave and convex curves and whose front each pair and means acting onthe locking and rear side lines are oblique to radial 15 5 blocks to force the grinding blocks against lines.

the walls and the outer flange: In testimony whereof I afix my signature 10. A grinding block whose outer end is a in presence of two witnesses. convex curve, whose inner end is a concave ELWIN R. HYDE. curve and whose front and rear side lines Witnesses: w are oblique to radial lines. I H. W. MEADE,

-11. A grinding block having a metallic E. M. OULVER. 

